What is the primary function of vitamin E as an antioxidant?

Vitamin E serves a crucial role as an antioxidant primarily by protecting cell membranes from oxidation. Antioxidants are substances that help combat oxidative stress in the body by neutralizing free radicals, which can damage cells and lead to various health issues, including premature aging.

Cell membranes are particularly vulnerable to oxidative damage due to their lipid composition. Vitamin E, which is a fat-soluble vitamin, integrates into these membranes and helps stabilize them, thereby preventing oxidative damage that can disrupt their integrity and function. This protective mechanism not only aids in maintaining cellular health but also contributes to overall skin health, making vitamin E a popular ingredient in skincare products aimed at providing anti-aging benefits.

In contrast to the other options, vitamin E is not primarily linked to respiratory health, collagen production, or directly reducing blood pressure. Its main action as an antioxidant is closely tied to its ability to safeguard cell membranes, which is integral for maintaining cellular function and preventing damage from oxidative stress.